I consider Youtube negative value. It is a service explicitly designed to suck up as much as possible of my time / attention, and youtube doesn't change how their algorithm works just because you pay for it with real money. The watchtime maximizing works the exact same time as at the very least all the content produced withing the ecosystem still needs to be watchtime maximizing.
Why would I ever pay for that?
Edit-to-add: Not to mention that I have yet to forgive google for killing Play Music, a much superior service.
People don't talk about this much, but much of Play Music lives on in Youtube Music. I am not sure if its because I was grandmothered in or something, but all my mp3s that are definitely not otherwise on YouTube still shockingly exist in my Youtube Music "Library".
The storage and library is, yes, AFAICT. It's a "full" migration, everyone I know who used Play Music heavily has had no data-retention issues at all with YT Music.
But the UX is so much worse, it's just mindblowing. Basically all of them left for something else eventually.
Why would I ever pay for that?
Edit-to-add: Not to mention that I have yet to forgive google for killing Play Music, a much superior service.